Constant-pressure suction label plate

The utility model discloses a constant pressure suction label plate which comprises a label suction plate and a plurality of air suction holes formed in the front face of the label suction plate, a cavity is formed in the label suction plate, an air suction notch is formed in the back face of the label suction plate, the air suction notch is communicated with the cavity, and the air suction holes are all communicated with the cavity. A plurality of air suction grooves are further formed in the front face of the label suction plate, one ends of the air suction grooves extend in the forward moving direction of labels on the label suction plate, the extending ends of the air suction grooves are flush with the side face of the label suction plate, the ends, deviating from the extending ends, of the air suction grooves keep a distance from the other side face of the label suction plate, and the air suction holes are formed in the top ends of the interiors of the air suction grooves respectively. A plurality of row